Species

Q.

What do we learn from the identification of individuals and populations?

Q. Which of the following organism are decomposers?

1. Bacteria
2. Amoeba
3. Fungi
4. Virus

Q.

A true species consists of a population

1. sharing the same niche

2. feeding over the same food

3. reproductively isolated

4. interbreeding

Q. Define a taxon. Give some examples of taxa at different hierarchical levels?

Q. ______ is considered the basic unit of taxonomy.

1. Kingdom
2. Order
3. Genus
4. Species

Q.

Species Plantarium was a publication of

1. Ray

2. Linnaeus

3. Mendel

4. Darwin

Q.

Basic unit of classification is

1. class

2. order

3. genus

4. species

Q.

why mules cannot be considered as species ?

Q. Assertion [A]: Phylogeny is the developmental history of a species.
Reason [R]: Species is a basic unit of taxonomy.

1. Both assertion and reason are true and the reason is the correct explanation of assertion
2. Both assertion and reason are true but reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Assertion is false and reason is true

Q. Two plants can conclusively be said to belong to the same species if they:

1. Can reproduce freely with each other and form seeds
2. Have more than $90\%$ similar genes
3. Look similar and possess identical secondary metabolites
4. Have the same number of chromosomes

Q.

Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand and bacteria on the other hand.

Q. Which among the following is the category with least number of organisms?

1. Order
2. Species
3. Tribe
4. Class

Q. Nicotiana sylvestris requires long days for flowering while Nicotiana tobacum requires short days for flowering. When both these were grown in a laboratory under controlled conditions of different photoperiods, they could be induced to
flower at the same time and also could be artificially cross pollinated to produce fertile offspring.

Which would be the best reason to classify N. sylvestris and N. tobacum under separate species?

1. They are morphologically and physiologically different from
   each other.
2. They cannot interbreed in nature.
3. They are reproductively different.
4. They produce different secondary metabolites.

Q.

Which of the following categories occupies the top-most position of the classification triangle?

1. Genus

2. Species

3. Order

4. Kingdom

Q.

Which among the following is a correct pair of decomposers?

1. Diatoms and slime moulds

2. Bacteria and viruses

3. Bacteria and fungi

4. Viruses and diatoms

Q. What is true for individuals of the same species?

1. Share the same niche
2. Live in the same habitat
3. Interbreeding
4. Live in different habitats

Q. Which among the following taxonomic categories has a real existence as a discrete unit in nature?

1. Phylum
2. Species
3. Genus
4. Kingdom